# What You Need:
→ Pastry
01 - 2 sheets puff pastry (approx. 17.6 oz, thawed if frozen)
02 - 1 large egg (for egg wash)
03 - 1 tablespoon whole milk
→ Apple Filling
04 - 3 medium golden apples, peeled, cored, and diced
05 - 2 tablespoons unsalted butter
06 - 1/4 cup granulated sugar
07 - 2 tablespoons brown sugar
08 - 1 teaspoon ground cinnamon
09 - 1/4 teaspoon ground nutmeg
10 - 1/2 teaspoon pure vanilla extract
11 - 1 tablespoon fresh lemon juice
12 - 1 tablespoon cornstarch
→ Optional Topping
13 - 2 tablespoons coarse sugar, for sprinkling
# How-To Steps:
01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - In a skillet over medium heat, melt the butter. Add diced apples, granulated sugar, brown sugar, cinnamon, nutmeg, and lemon juice. Cook for 4 to 5 minutes, stirring occasionally, until apples soften.
03 - Stir in vanilla extract and cornstarch. Cook for an additional 1 to 2 minutes until the mixture thickens. Remove from heat and let cool slightly.
04 - On a lightly floured surface, roll out puff pastry if needed. Cut each sheet into four equal squares to yield eight squares in total.
05 - Place a generous spoonful of apple filling in the center of each pastry square. Fold each square diagonally to form a triangle and press edges to seal. Crimp edges with a fork for a secure seal.
06 - Place the assembled turnovers onto the prepared baking sheet, spacing evenly.
07 - Whisk the egg with milk and brush the mixture evenly over the turnovers. Optionally, sprinkle coarse sugar on top for added texture and sweetness.
08 - Use a sharp knife to cut a small slit on the top of each turnover to allow steam to escape during baking.
09 - Bake in the preheated oven for 20 to 25 minutes, or until turnovers are puffed and golden brown.
10 - Transfer turnovers to a wire rack and cool for 10 minutes before serving.